Bead-forming machine



Feb. 3, 1925. 1,524,946

0. P. NYSTROM BEAD FORMING MACHINE glad March 17, 1925 4 Sheets-Sheet lM OsoarPNgsfiom 13 wgW K Feb. 3, 1925. 1,524,946

0. P. NYSTROM BEAD FORMING MACHINE Filed March 1'7, 1923 4 Sheets$heet zE66 I q a r A 1/ I /C I AM 3 l2 15 fig-l B OscavRNg it m (wforncg Feb.3, 1925. 1,524,946

0. P. NYSTROM BEAD FORMING MACH INE Filed March 17, 1923 4 Sheets$heet 3lnuemor OseowPN sfrom.

Feb. 3, R925.

0. P. NYSTROM BEAD FORMING MACHINE 4 Sheets-Sheet 4 Filed March 17, 1923InueMor J B OsoarPN sr fim Patented Feb. 3, 1925.

UNITED STATES.

PATENT OFFICE.

OSCAR P. NYSTROM, OF HOLLAND, MICHIGAN, ASSIGNO'R TO HOLLAND FURNACECOM- PANY, OF HOLLAND, MICHIGAN, A CORPORATION OF MICHIGAN.

IBEAD-FORMING MACHINE.

Application filed March 17, 1923. Serial No. 625,837.

To all whom it may concem:

Be it known that I, OSCAR P. NYSTROM, a citizen of the United States ofAmerica, residing at Holland in the county of Ottawa and State 0Michigan, have invented certain new and useful Improvements inBead-Forming Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to a pipe beading machine, being of useparticularly in beading the ends of elbow sections of pipe such as areused in smoke pipes and hot air pipes in furnaces. The differentsections which are used in making an elbow are formed on this machine attheir ends with outwardly pressed and continuous beads adapted tointerlock with similar beads on the adjacent sections in making up theelbow, whereby an elbow is'made with the parts or sections thereofsecurely fastened together. It is a primary object and purpose of thepresent invention to make a machine in which the pipe or elbow sectionsmay be beaded very rapidly, the mechanism being practically automatic inaction after it is brought into action by operating a foot pedal, nooperations by the operator of the machine being required other thanputting the plain sections in the machine and taking them out after theheads have been formed. The machine has many novel constructive featuresand arrangements of parts for effectively attaining the ends outlined,as will be apparent as understanding of the invention is had from thefollowing description, taken in connection with the accompanyingdrawings, in which,

igure 1 is a front elevation of the bead forming machine.

Fig. 2 is a fragmentary vertical section taken substantially on theplane of line 2-2, of Fig. 4.

Fig. 3 is a centralv vertical section through the machine, the plane ofthe section being from the front to the rear of the machine.

Fig. 4: is a plan view of the machine.

Fig. 5 is a vertical section showing a fragmentary portion of themachine, the section being on the line 5-5, of Fig. 4. 5

' the shaft.

Fig. 6 is a fragmentary vertical section enlarged through the upperportion of the machine, and on the plane of line 66, 01 Fig. 4.

Fig. 7 is a view similar to Fig. 6 but with the partsin a differentposition or that which they take in the bead forming operation, and

Fig. 8 is a plan with parts broken away and shown in section showing theroller die carrying head and the manner of mounting the roller carryingslides thereon.

Like reference characters refer to like parts in the different figuresof the drawings.

In the construction of the machine a support is provided comprisingvertical posts 1 at the corners of the machine, those at each side ofthe machine being integrally connected by a cross member 2 (see Fig. 3).These posts extend downwardly from the top of the machine for a distanceand below the lower ends of the same, the machine is supported by aplurality of legs 3, a table 4 being interposed between the posts 1 attheir lower ends and resting on the upper ends of the legs which aresecurely attached to the table. At the upper ends of the posts a topmember 5 is located and secured in.

place, this completing the supporting frame structure for the machine.The side posts 1 of the supporting frame are also connected adjacenttheir upper ends by cross bars 2* which serve as ledges on which thesides of the top member 5 bear as shown.

A bearing sleeve 6 is formed centrally of the table 4 and a like sleeve7 is formed with the member 5 directly above the sleeve 6. A shaft 8 ismounted vertically and passes through said sleeve, being driven througha belt around a pulley 9 splined on This pulley has a collar 10 formedat the lower end of the hub thereof, and a bracket 11 is secured to thetable 4, extending upwardly to the collar and having a lip turnedinwardly from the upper end of the bracket to enter the annular groovein the collar, thereby holding the drive pulley at a fixed level, theshaft 8 being mounted for longitudinal movements up and down through thepulley. A foot lever 12 is located substantially horizontally under thetable 4 and is pivotally mounted at 13 at the lower end of a supportingarm 14 which depends from the table back of the shaft 8. The foot leverextends to in front of the supporting frame and at its front end isformed with a pedal head 15 for engagement by the foot of the operator.The lever is formed with an integral collar 17 between its ends, off-setto one side thereof and the lower end of the shaft 8 is reduced in size,making an end portion 8 which passes through the collar, a set collar 19being secured on the lower end of the portion 8. A weight 16 on the rearend of the lever 12 normally holds the shaft in its upper position, butthe operator of the machine by stepping on the pedal head 15 overcomesthe weight and draws the shaft to a lower position, as is evident.

At the upper end of the shaft 8 and mounted within the sleeve 7 is asleeve 20 which is splined on the shaft 81 This sleeve 20 is formedintegrally with and depends from a circular head 21 which is located inan annular recess 22 formed in the upper side of the top member 5 of thesupporting frame of the machine. Suitable anti-friction bearings aredisposed between the lower side of the head 21 and the top member A pairof oppositely extending slides 23 are slidably mounted in the head 21 insuitable grooves 24 therein, the slides 23 being trapezoidal in crosssection and the grooves 24 formed to correspond. The ends of the slides23 project a short distance beyond the sides of the head 21 and each ofthe outer ends of the slides carry roller dies 26 which are mounted toturn freely on vertical axes. The slides are connected and drawntogether normally by tension springs 25 (see Fig. 8) so as to normallyoccupy inner positions with inner ends abutting.

The inner ends of the slides at their middle portions are cut to forminclined cam surfaces 27 and recesses are also cut so that a reducedneck 28 at the upper end of the shaft 8 may pass between the slides whenthe same are located with inner ends in abuttin engagement. Above theneck 8, a conica portion 29 is formed for a distance, merging into ashort section 30 of the same diameter as the shaft 8. A threaded boss 31extends upwardly from the upper end of the section 30 on which a disk 32is threaded down into engagement with the upper end of said section 30,and locked in place by a lock nut as shown. Two set screws-32 arethreaded through the disk 32 at opposed sides thereof and the same arecapable of adjustment whereby the distance that the shaft 8 may be moveddownwardly is determined, the lower ends of the screws 32 coming intocontact with the head 21 and stopping further downward movement of theshaft. As the shaft is drawn downward when the lever 12 is operated, thecone at 29 rides against the cam surfaces 27 in the slides 23, forcingsaid slides and the roller dies 26 thereon outwardly and in unison; andas soon as the pressure on the lever 12 is released, the weight 16 movesthe shaft 8 upwardly, permitting the slides to return inwardly to normalposition under the influence of the springs 25.

Above the top 5 two plates 33 are mounted, one at each side of the head21, each having a 'semi-circular recess at its inner edge larger thanthe head. These plates are pivotally mounted at 34 to the top member 5near their rear and-inner edges. In the semi-circular recessed portionsof the plates, dies are secured to act in conjunction with the rollerdies 26. Each plate adjacent its front edge is formed with a shortvertical slot (see Fig. 5) through which -screws 37 pass, this limitingthe. extent of movement of the plates which are norma'lly separated asfar as the screws 37'and slots 36 will allow by a spring 38 under.compression located at the front andgzbet-weeai said plates (see Figs.1, 4 and 5)'.'

At the front of the top member 5 afbraeket is secured included in whichis a vertical sleeve 39 which extends downwardly,'and from whichadjacent its upper end and at opposite sides ears 40 extendhorizontally. A lever 41 is pivotally mounted between its ends at 42;between the cars 40 of each pair of ears, said levers extending abovethe pivots through openings in the member 5 and terminating in partiallyrounded heads 43 which enter openings 44 in the two plates 33.

A rod 45 has its upper end portion slidably received in the sleeve 39and at its lower end is connected to the foot lever 12. A member 46 ispermanently secured to the rod 45 directly below. the sleeve 39, thelower portion of the member 46 being tapered downwardly. to form aconical extension 47 to the lower part of said member 46. A screw 48passes through the lower end 49 of each of the'levers 41, the ends ofscrews 48 coming against opposite sides of the rod 45 immediately belowthe cone portion 47 of member 46 when the rod 45 is in upper position,as shown in Fig. 5.- On downward operation of the foot lever 12 anddownward movement of the rod 45, the inclined sides of the cone 47 rideagainst the ends of screws 48 whereby levers 41 are operatedso as tomove the plates toward each other at the front with a compression of thespring 38. As soon as the foot lever is released, the spring 38 movesthe plates 33 away from each other, separating them at their frontportions as is obvious.

In the operation of the machine, as thus constructed, a section of anelbow, as shown at 50 in Figs. 4 and 6, .is placed with one edge locatedaround the recess 22 in the member 5, the elbow section passing aroundthe head 21 and the roller dies 26 carried thereon, and being locatedwithin the dies 35 on the plates 33. This is done with the parts of themachine in open normal position. The operator then depresses the lever12 whereupon the plates 33 are moved inwardly so as to bring the dies 35to the outer sides of the elbow secformed therein in the same manner.

tion 50, and the slides 23 are moved out- \vardly in oppositedirections, carrying the roller dies 26 against the inner sides of thesection 50, tending to press the metal into the grooves of the dies sothat in a short time a bead 51 tis formed at the edge of the pipesection, as shown in Fig. 7. As soon as the foot lever 12 is releasedafter the bead is formed, the roller dies are retracted, moving awayfrom the bead formed, and the plates 33 with attached dies 35 moveoutwardly away from the bead, so that the beaded section of the elbow isfree for removal from the machine. It may he removed and other sectionshave beTags e operation is very rapid and by using this machine-a largequantity production is had.

The construction described is very practical, useful'and in every way isefficient for the purposes for which it is designed. The automaticrelease of the elbow section after the head is formed is a very usefulfeature of the invention. .The machine has had extensive test and trialand is in every way exceptionally satisfactory. The appended claimsdefine the invention and all forms of structure coming within theirscope are to 'he considered as comprehended by the inrention.

I claim:

1. In a machine of the class described, a horizontally located flatmember, two plates mounted on and above said member, each of said,plates covering substantially one halfof the member and each at itsinner portion having a semi-circular recess cut therein, a grooved dieattached to each plate and located. in the recess thereof, meanspivotally connecting said plates to the member to turn about a verticalaxis adjacent the rear and inner edges of said plates, :1 springinterposed between the' plates adjacent their front edges tending toseparate them, stop means limiting the separation of the plates, avertically mounted rod, means for moving the same downwardly, a membermounted on the rod having a conical extension at its lower end, twolevers pivotally mounted, one at each side of the rod, the upperportions of said levers extending through openings in said first memberand said plates, screws threaded through the lower ends of the leverstoward the rod and the member and plate, a foot lever pivotally mountedbetween its ends on and below the plate, connections between the leverand the lower end of the shaft, a weight on the lever tending to holdthe shaft in an upper position, a head splined on the upper end of theshaft. and located above said member, two slides slidably mounted forhorizontal sliding movement on the head, one at each side of the shaft,spring means normally drawing the slides toward each other, roller diesmounted. to turn on vertical. axes, one at the outer end of each slide,a reduced neck on the shaft where it passes between the slides and anenlargement above the neck having a conical lower portion for moving theslides outwardly on downward movement of the shaft, two plates locatedon and above the said member, one at each side of the head, each havinga semicircular recess in its inner side, means pivotally connecting theplates to the member adjacent the rear and inner ed es of the plates, aspring between the pfiites adjacent their front edges and tending toseparate said plates, semi-circular dies carried by said plates in therecesses therein, a-vertical rod connected at its lower end to the footlever and movable downwardly with the down-" ward movement of the shaft,a conical member fixed on the rod, two levers pivotally mounted betweentheir ends on the support,

through the lower ends of the levers, the

inner ends thereof be'ing'adapted to bear against opposite sides of therod and against opposite'sides of the conical member when the rod ismoved to lower position, substantially as and for the purposesdescribed.

In testimony whereof I aflix my signature.

' OSCAR NYSTROM.

